Joe mentioned the counterbalanced lift lock that uses water from one side to lift the other. It is in Peterborough, Ontartio, Canada and there is a description in Wikipedia. http://en.wikipedia.org/wiki/Peterborough_Lift_Lock It is the highest hydraulic lift lock in the world, lifting 19.8 metres, or 65 ft. John *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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